浅谈固、液相水合法生产重质纯碱的质量控制

文章就固相水合法及液相水合法生产重质纯碱的质量问题,对影响产品质量的三个主要因素(氯化钠含量、粒度、白度)进行了研究和探讨,从而阐述了降低产品中氯化钠含量、控制产品粒度及提高产品白度的有效途径。

浅谈高原地区液相水合法生产低盐重质纯碱技术

文章通过对液相水合生产优质低盐重质纯碱引进工艺技术及设备选型进行了深入探讨和技术研究,在与大型碱厂采用传统固相水合生产工艺进行技术对比的基础上,论证了在海拔高度3 000m、大气压强70.8kPa的高原地区条件下,首创引进高原地区液相水合生产优质低盐重质纯碱技术,并且实现了生产能力扩大化,达到了节能高效的综合效益。

液相水合离心机布料盘改造

介绍了我公司液相水合离心机在液相水合生产低盐重灰中出现的问题,针对问题提出布料盘系统的改造方法。

液相水合器内部结构的优化改进

液相水合器作为液相水合法制低盐重质纯碱的核心设备,其运行的稳定性是控制产品质量的重要环节之一.通过对设备结构的优化改进,提高设备运行效率,缓解设备内部结疤现象,提高产品产量、品质,为企业创造更高的经济效益.

肯尼亚马加迪粗纯碱精制试验研究

采用液相水合工艺对肯尼亚马加迪粗纯碱进行试验室精制研究,所得精制纯碱与原粗纯碱相比,碳酸钠含量提高1.26%;NaF含量降低64.0%,堆积密度提高了10.86%,超过0.8g/cm3重质纯碱对堆积密度的要求,主要指标满足肯尼亚纯碱质量标准要求。

低盐重质纯碱生产技术及质量控制方法探究

对低盐重质纯碱的生产方法和工艺技术进行深入探究,分析影响产品质量的主要因素,优化工艺生产中的操作方法。通过调整固、液相水合法产品的混合比例,得到优质的低成本低盐重质纯碱。

Analysis of influencing factors on suction capacity in seabed natural gas hydrate by cutter-suction exploitation

The mathematical and simulation models of working head in the deep-sea working environment were built to analyze the effects of cutter-suction flow,cutter-head rotating speed,cutting depth and suction port position on the cutter-suction capacity.The efficiency of the cutter-suction is analyzed based on the analysis of the variation law of the solid-phase volume fraction of the flow field,the variation law of the velocity distribution in the flow field and the distribution law of the solid-phase concentration.The results show that the increase of cutter-suction flow can significantly improve the cutter-suction efficiency when it is less than1000m3/h.However,when it is more than1000m3/h,it is helpless.When the cutter-head rotate speed is within the range of10–25r/min,the cutter-suction efficiency stabilizes at about95%.While the speed is greater than25r/min,the cutter-suction efficiency decreases sharply with the increase of cutter-head rotate speed.With the increase of cutting depth,the cutter-suction efficiency first increases and then remains stable and finally decreases.The cutter-suction efficiency remains at about94%when the suction port position deviation ranges from0°to30°,but it has a sharply reduction when the deviation angle is more than30°.

On-Line Pyrolysis-Liquid Chromatography of （Meth-） Acrylic Acid in Waterborne Polymers Using Cryogenic Injection

Pyrolysis gas chromatography is not a comprehensive analysis method for the determination of acrylics. Polar acrylic monomers show low abundance by gas chromatography. Because of this, a home-made pyrolysis liquid chromatographic injector by means of cryogenic-focussing is developed to determine the presence and concentration of hydroxyl and carboxyl functional monomers present in water- and solvent-borne acrylics. We have shown the prove-of-principle of using cryogenic-focussing for UPLC （pyrolysis-ultra-performance liquid chromatography） injection.